Software Java Engineer

Location: Sofia

Time Type: Full time

Job Description

Founded in Switzerland in 1968, Zühlke is owned by its partners and located across Europe and Asia. We are a global transformation partner, with engineering and innovation in our DNA. We're trusted to help clients envision and build their businesses for the future – to run smarter today while adapting for tomorrow’s markets, customers, and communities. Our multidisciplinary teams specialise in tech strategy and business innovation, digital solutions and applications, and device and systems engineering. We excel in complex, regulated spaces including health and finance, connecting strategy, tech implementation, and operational services to help clients become more effective, resilient businesses.

If you share our values and want to do the best work, for the right reasons, we can offer you the chance to do it on a global scale and play a real role in shaping our exciting journey.

About the Role

We are looking for an Advanced Software Java Engineer, to join our development team. In this role, you will build backend microservices using Java 21 and Spring Boot. You will work with a strong focus on clean architecture, reliability,and maintainability. You will own features end to end, from API design to production on Kubernetes.

Responsibilities 

• Develop and maintain backend microservices using Java 21 and Spring Boot 4
• Design and implement REST APIs documented with OpenAPI, and integrate with other internal and external services
• Build integrations and messaging flows with Apache Camel and Kafka
• Work with PostgreSQL through Spring Data JPA/JDBC, and manage schema changes with Flyway 
• Model and automate business processes with the Flowable BPMN workflow engine
• Secure services with Spring Security, OAuth2 and Keycloak
• Write clean, well-tested code with JUnit 5, RestAssured and WireMock
• Work with containerized applications deployed to Kubernetes with Helm and GitLab CI/CD
• Participate in code reviews and contribute to best practices
• Monitor and troubleshoot services in production with Prometheus and Grafan

Requirements

• Strong experience with Java (17+) and Spring Boot
• Solid knowledge of the Spring ecosystem (Spring Web MVC, Spring Data JPA, Spring Security, Validation)
• Experience designing and consuming REST APIs
• Good knowledge of SQL and relational databases, ideally PostgreSQL
• Experience with automated testing (unit and integration), including JUnit 5 and Mockito
• Basic understanding of Kubernetes, Docker, and cloud-native environments
• Familiarity with Gradle and Git-based workflows (merge requests, code reviews)
• Good understanding of object-oriented design, clean code, and microservice architecture

Nice to have

• Experience with BPMN workflow engines (Flowable, Camunda)
• Experience with Apache Camel or other enterprise integration frameworks
• Experience with Kafka or other event-driven architectures
• Knowledge of OAuth2 / OpenID Connect and Keycloak
• Experience with S3-compatible object storage (e.g. MinIO)
• Experience with Helm, GitLab CI/CD, and Azure (AKS)
• Familiarity with observability tools (Prometheus, Grafana) and code quality tools (SonarQube)
• Experience with MapStruct, ArchUnit, or Testcontainers
• Working knowledge of German

What we offer

• Work life blend: we offer a safe & healthy workplace, with flexible working hours and the possibility to work from home
• Profit share scheme: In addition to your annual salary, you may receive a profit share defined by the company’s success in the previous year
• Global and Diverse Zühlke community: witness how colleagues from all our 16 offices across the globe come together to create a unique, positive and inclusive work culture, learning from one another at annual team camps, and celebrating year-end parties and other local festivities
• Committed to development: we are committed to the growth of our people and are investing in your development. We’re empowering you to build the skills you need to make a positive impact, both personally and for our clients, today and in the future.
  
  For benefits that we offer please go to this link for Bulgaria.

If you feel you don't meet all the requirements, we are still happy to get to know you, learn more about your ambitions and ideas and look forward to receiving your application!

We welcome people from all backgrounds, regardless of their gender, personality, national origin, race, religion, colour, sexual orientation, gender identity, age, marital status, disability or veteran status.